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A) r e maliials Carrot be haxdsnsod by
A) P
oinon, wrGught inon ond extnemy low coubon stiel
Biron, iren,wrou iren and midium Carbon sToad,
Pus ivon, 4 Aluminium
OThe Name Pa Iron.
woo ught (wovkad Iron
8) CPu In
CAST Iron
Piq Tron Contain - Coxbon
A 1 s .- 3.5%
3 57, - 4.5,
5
C4.5 Y, - 5%
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A) 31,000
8 13,000
c)3,00o
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A 2.-6%
8 37 5 7 .
c 67.-8%
6Cost Iron is
A) wy Maleable
BTOugh
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Fewt ho. Conben
A)O0D67.
8) 0.67,
C)o067
)Cemendite haue - Costbsn
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.66
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c Ptedst
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lo) Mila Steal Conta
A) O:3-O.8 7.
6) 20.3
C) o8 - <1.7
) Hou 09ta eoo mals iolenlad

ASAE identiyication
ATA I00 Spectation
c JAR Idsniation Speei ittion
1 How Man digits are ued in tha SAE nunberirg syutem?

TuwO
Whad do the Ltth "SA.G ands Jor
ASOciely Audomodiwe Engineostirg
Stondaxd gAviation fngineexing
SOciet e Aviadien Engneex
4The ast too (o» ths) diqts A intendod toind icak?

The
Hundsudth 4% a Caxbon
Ma Jov alayg elamut
TPe Sted.
hiah sen is too Sodt and neCactie?
A) Pa T7ôn
Ought Ivorn
Cant I ren
£) Two calagoties s Natanials Shich uyils stveng-h,
Hadnes 4 toughn?
A Nic Ko - ChoLermium/chXomium - Vanadium
B) Cher-tickt. VANADIUH
c Chemium
hLeh Steals ae useol in highly stvesdeol machi

9ost Such as guars,Shala,, Sprigs 4 bearíng.
Post
CarLen Steel.
A LOu
BnicKal -Chstemiwn
c Chnomium-Vanadium,
0 Both 8 2 c
CvrtiCa temp Jo Annealing
The Maximum
A q oo°c
B+60c
c+oo'c
etícas temp joT Novmalizi?
9The MaximuwM
00°C
8 800°c
C)H00'c
Cause StreAA A maks maal to beCeme s t i
ABortle
AHot ooTk ing
8)cold uwotk
CTempern wakorv +ha metal.
Qain guesth 4
21) Cauusts
AHot 0sKirg
B cold I OIking-
Precipitasion Hent teatrmort.
in ceaDD
2a
A Chaomicwm
wicKed
Vanadium.
B oth A
23) NiCKal incveas
AHaodh AStvengh
e) TDughnes Handresu
strength A Toughnus
itic od
o h 25, ick
25, nickes addsd,the Steel is
aunte n
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8) Non- Magntie
cfentomajnetic ane uhite minerals
5
A)Dolomites
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8) 2 . nickal
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Anaue
14) A 2a) D
1 a) 8 23 )
12 A 24)8
25) A
4A
4 B 26) c
5A
C
18) c
1)A
20) B
08 A
1. THE INTENSITY OF THE STRESS WILL DEPEND ON THE ……….?
ANS]MAGNITUDE AND DIRECTION OF THE APPLIED FORCE
AND THE CROSS-SECTIONAL AREA OF THE MATERIAL
WITHSTANDING THE STRESS.
2. ….…………. IS THE ABILITY OF A MATERIAL TO RESIST

BREAKING UNDER A TENSION FORCE.
ANS] TENSILE STRENGTH
3. DEFORMATION DUE TO STRESS IS ………..?

ANS] STRAIN
4. STRESS IS DIRECTLY PROPORTIONAL TO STRAIN WITHIN THE

ELASTIC LIMIT IS ………..?
ANS] HOOKES LAW
5. IN GAS CARBURIZING, ………. GAS IS USED TO HEAT THE

ELEMENT FOR 3 HOURS.
ANS]METHANE OR PROPANE
6. THE STRESS BEYOND WHICH A MATERIAL BECOMES

PLASTIC.?
ANS]YIELD POINT
7. THE PROCESS OF LENGTHENING THE METAL ?

ANS] ELONGATION
8. THE MOST COMMONLY USED UNIT OF STRESS IS ?

ANS]N/mm2
9. HARDENING OF MATERIALS INCREASES?

ANS] BRITTLENESS
10.NORMALIZING IS DONE TO ?
ANS]REMOVE STRESS AND STRAIN OF INTERNAL STRUCTURE
11.TO REDUCE BRITTLENESS IN HARDENED MATERIALS, THEY

ARE HEATED TO A LOW TEMP AT AROUND…….DEGREE?
ANS]200-350
12.TESTING OF MATERIALS IS DONE TO ?

ANS] CHECK THE STRENGTH AND TOUGHNESS OF THE
MATERIAL
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pact
Questions from 40 to 50 pgs
1 :for what purpose impact test is used
a:indication of toughness of a material
b:indication of roughness of material
c:both a and b
Ans :a
2:examples of impact test
a:izod
b:charpy
c:both a and b
Ans :c
3:the progressive deterioration of the
strength of a material is defined as?
a:impact
b:fatigue
c:strain
Ans:b
4:what shows the initiation of fatigue in

material
a:breakage on material
b:softening of material
c:small crack on material
Ans : c
5:._ _ _ is always present in iron?
a: manganese
b:carbon
c:phosphorus
Ans:b
6:which improves the fluidity of molten iron

for intricate casting
a:phosphorus
b:sulphur
c:manganese
Ans:a
7:manganese combines with sulphur to
form?
a:sulphide
b:manganese sulphide
c:both a and b
8:bessemer converter is ?
a:pivoted, egg shaped container with a

charging hole at the small end.
b:pivoted, square shaped container with a

charging hole at the small end.
c: non of the above.

9:how many tonnes of high quality steel can
be produced in bessemer converter in one
hour?
a:50 tonnes
b:20 tonnes
c:30 tonnes
Ans:b
1 0:electric furnaces are uses to make?
a: high quality steels
b: low quality steel
c : medium quality steel

11 :advantage of el ec tri c furnace is th at ?
and
a:there is fa r less of th e gas, fu m es
im pu rit ie s.
and
b:there is fa r m or e of th e gas, fu m es
im pu rit ie s
m es
c:there is fa r less of th e gas, m or e fu
and im pu rit ie s
An s:a
12:li m e is ad de d to th e ch ar ge to fo rm ?
a: in go ts
b:ba si c sl ag
c:bo th a an1d b
Ans:b
1 1 ed?
13:a bl ock of ste el i1s call 1
a:ingots
b:sllag
1
c:a nthracirt e
Ans :a
14:i n bas i c oxygen stee I making, lhre charge

1 1
1
consi1sts of?
a:sc rap stee l
bdlime
c : m olte n pig ironr

1
d:allll 0 f the arbove

1
Ans: d
1 5:the heat required to melt the charge is
produced by electric arcs struck between
___ and _ _ _?
a:carbon electrodes and steel
b:pig iron and steel
c: carbon electrode and lime
Ans:a
1) which metal is used for rock crusher parts?
Ans:manganese
2) High manganese steels contain ____% of manganese?
Ans:12%
3) Low nickel/ chrome steel contain __ % of Nickel and __% of Chromium?
Ans: 3% Nickel/1%Chromium
4) High nickel/ chrome steel contain __ % of Nickel and __% of Chromium?
Ans: 18% Chromium /8% Nickel
5)Chromium increase ___and___?
Ans:Hardness and strength
6) Chromium increase corrosion resistance Used to make __and __ bearings?
Ans: ball and roller
7) Nickel increase __ and__?
Ans:strength and toughness
8)Nickel is used for production of what?
Ans:bolts, keys and pins
9) Nickel improves __and __?
Ans: resistance and corrosion
10) Alloy steels are combination of __and __?
Ans: iron and carbon
11) what is used to make Electric furnace?
Ans:High quality steels
12) what is the advantages of electric furnace?
Ans: far less of the gas, fumes and impurities
13) which alloys af iron and upto 1.7% carbon although 1.5% gets exceeded?
Ans:Plain carbon steels
14)Low carbon or mild steel contain upto ___ carbon?
Abs:0.3%
15)High carbon steel contain ___to___carbon?
Ans:0.8% to 1.7%
Q1: Which of the following is true for Vanadium when used as a
alloying metal?
a- Increases tensile strength and elastic limit.
b- Increases shock resistance and fatigue resistance
c- Both a & b
Q2: For Molybdenum alloy metal to receive maximum effect what
percentage of the metal is required?
a- High percentage
b- Low percentage
c- Minimum amount
Q3: what is the percentage of nickel in steel used in aircrafts?
a- 2.75 to 3
b- 3 to 3.75
c- 3.75 to 4
Q4: When nickel’s physical properties increase what happens to its
ductility?
a- Ductility increases
b- Ductility decreases
c- No noticeable change
Q5: what is the anticorrosive property of stainless steel determined by?
a- Surface Condition
b- Conc. Of Corrosive Agent
c- Both a & b
Q6: . The corrosion-resistant steel most often used in aircraft

construction is known as 18-8 steel because it is ?
a- 18% Chromium and 8% Nickel
b- 18% Nickel ad 8% Chromium
c- None of the above
Q7: 18-8 steel strength can be increased by
a- Hot working
b- Cold working
c- Annealing
Q8: What is the percentage of vanadium present in chrome-vanadium
steels?
a- 17%
b- 15%
c- 18%
Q9: which of these options represent chrome-vanadium with high carbon
content?
a- SAE 6159
b- SAE 6195
c- SAE 6150
Q10: How much carbon is present in Chrome-Molybdenum Steels?
a- 0.15-0.20
b- 0.25-0.55
c- 0.55-1
Q11: Which of these statements are False for maraging steels?
a- Tough compared to low alloy steels
b- Bad resistance to stress corrosion and hydrogen embrittlement
c- Simple heat treatment methods
Q12: Which has a greater resistance to hest?
a- Aluminium
b- Alloy steel
c- Both are equal
Q13 What material is used for undercarriages , engine mountings, door
latches?
a- Cast iron
b- Alloy steel
c- Inconel
ANSWERS
1-c
2-b
3-b
4-c
5-c
6-a
7-b
8-c
9-b
10-b
11-b
12-b
13-b
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DC- ~) v1- 3)Yl 4) c,, n)b 6 )A -J)o..g)- oi)b lO_J(:A.

9The Cntinueu re -Chaxging unac will 9rduca

) Hou 09ta eoo mals iolenlad

c JAR Idsniation Speei ittion

1 How Man digits are ued in tha SAE nunberirg syutem?

4The ast too (o» ths) diqts A intendod toind icak?

hLeh Steals ae useol in highly stvesdeol machi

ANS]MAGNITUDE AND DIRECTION OF THE APPLIED FORCE

AND THE CROSS-SECTIONAL AREA OF THE MATERIAL

WITHSTANDING THE STRESS.

2. ….…………. IS THE ABILITY OF A MATERIAL TO RESIST

3. DEFORMATION DUE TO STRESS IS ………..?

4. STRESS IS DIRECTLY PROPORTIONAL TO STRAIN WITHIN THE

5. IN GAS CARBURIZING, ………. GAS IS USED TO HEAT THE

6. THE STRESS BEYOND WHICH A MATERIAL BECOMES

7. THE PROCESS OF LENGTHENING THE METAL ?

8. THE MOST COMMONLY USED UNIT OF STRESS IS ?

9. HARDENING OF MATERIALS INCREASES?

11.TO REDUCE BRITTLENESS IN HARDENED MATERIALS, THEY

12.TESTING OF MATERIALS IS DONE TO ?

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a:indication of toughness of a material

b:indication of roughness of material

2:examples of impact test

4:what shows the initiation of fatigue in

c:small crack on material

6:which improves the fluidity of molten iron

a:pivoted, egg shaped container with a

b:pivoted, square shaped container with a

c: non of the above.

1 0:electric furnaces are uses to make?

a: high quality steels

b: low quality steel

c : medium quality steel

14:i n bas i c oxygen stee I making, lhre charge

a:sc rap stee l

c : m olte n pig ironr

d:allll 0 f the arbove

a:carbon electrodes and steel

b:pig iron and steel

c: carbon electrode and lime

Q6: . The corrosion-resistant steel most often used in aircraft